摘要
针对叶片流动分离导致垂直轴风力机气动性能下降,基于鸟类羽毛随阵风轻微抬起维持气流在其外翼再附着的特点,在叶片两侧加装气动弹片,通过计算流体动力学方法研究其对垂直轴风力机的作用机理以及对其气动性能的影响,并基于动态模态分解对比分析气动弹片作用下垂直轴风力机尾迹流场模态特征。结果表明:气动双弹片可抑制叶片表面流动分离,提升整机气动性能,有效增加流场稳定性;可大幅提升垂直轴风力机叶片瞬时转矩、切向力及翼型吸力面压力系数,且使低尖速比成为最佳尖速比,有效提高自启动性能及运行过程中的稳定性,从而提升垂直轴风力机气动性能,流场动态模态分解表明双弹片有助于抑制尾流涡强度。
Aiming at the problem of aerodynamic performance degradation of vertical axis wind turbine caused by blade flow separation,based on the characteristics of bird feathers lifting slightly with gust to maintain the reattachment of airflow on its outer wing,aerodynamic flap is installed on both sides of the blade.The computational fluid dynamics method is used to study its mechanism of action on vertical axis wind turbine and its influence on aerodynamic performance and based on dynamic mode decomposition,the modal characteristics of wake flow field of vertical axis wind turbine under the action of pneumatic shrapnel are compared and analyzed.In terms of instantaneous torque,the aerodynamic double flaps significantly increase the tangential force of the vertical axis wind turbine blade and the pressure coefficient of the airfoil suction surface.At the same time,the low tip speed ratio becomes the best tip speed ratio become the best tip speed ratio,which improves the self-starting performance and stability in the operation process,thus improving the aerodynamic performance of the vertical axis wind turbine,the dynamic mode decomposition of the flow field shows that the double spring is helpful to suppress the wake vortex intensity.
作者
俞洪静
岳敏楠
李春
缪维跑
王培麟
黄浩达
Yu Hongjing;Yue Minnan;Li Chun;Miao Weipao;Wang Peilin;Huang Haoda(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《太阳能学报》
北大核心
2025年第1期25-33,共9页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(52476212,52376204,52375193)
上海市Ⅳ类高峰学科-能源科学与技术-上海非碳基能源转换与利用研究院建设项目。
关键词
垂直轴风力机
气动性能
流动分离
计算流体动力学
气动双弹片
vertical axis wind turbines
aerodynamic performance
flow separation
computational fluid dynamics
aerodynamic double flaps
作者简介
通信作者:岳敏楠(1982-),女,博士、副教授、硕士生导师,主要从事流动控制风能利用方面的研究。ymn@usst.edu.cn。
